Piston And Piston Ring Inspection - Suzuki kq750 Service Manual

1D-43 Engine Mechanical:
b) Install the 2nd ring (3) and 1st ring (4) to piston.
NOTE
1st ring (4) and 2nd ring (3) differ in shape.
NOTE
Face the side with the edge "C" and stamped
mark "D" upward when assembling.
"C"
"D"
2) Position the gaps of the three rings and side rails as
shown. Before inserting piston into the cylinder,
check that the gaps are so located.
"D"
"D": 2nd ring and lower side rail
"E": Upper side rail
"F": 1st ring and spacer
3) Install the piston and piston pin. Refer to "Engine Top
Side Assembly (Page 1D-21)".
4
3
I831G1140179-02
4
3
I831G1140180-01
EX
"E"
IN
"F"
I831G1140181-03

Piston and Piston Ring Inspection

Refer to "Piston Ring Removal and Installation
(Page 1D-42)".
Piston Diameter
Measure the piston diameter using the micrometer at 15
mm (0.6 in) "a" from the skirt end. If the piston diameter
is less than the service limit, replace the piston.
Special tool
(A): 09900–20210 (Micrometer (100 – 125 mm))
Piston diameter
Service limit: 103.880 mm (4.0898 in)
Piston-to-cylinder Clearance
Subtract the piston diameter from the cylinder bore
diameter. If the piston-to-cylinder clearance exceeds the
service limit, replace both the cylinder and the piston.
Piston-to-cylinder clearance
Service limit: 0.120 mm (0.0047 in)
B831G21406032
"a"
I831G1140335-02
(A)
I831G1140337-01